Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantos anos houve um clássico de Peter Jackson?
 ###Tabelas: CREATE TABLE doubles_20_10-10 (doubles_20_10-10_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents in the final VARCHAR, Score VARCHAR) CREATE TABLE wins_5 (wins_5_id AUTO_INCREMENT PRIMARY KEY, Year INT, Championship VARCHAR, Winning score VARCHAR, Margin VARCHAR, Runner(s)-up VARCHAR) CREATE TABLE ranking_event_finals:_8_4_titles_4_runner-ups (ranking_event_finals:_8_4_titles_4_runner-ups_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Year INT, Championship VARCHAR, Opponent in the final VARCHAR, Score VARCHAR) CREATE TABLE table_of_federal_taxation_and_spending_by_state (table_of_federal_taxation_and_spending_by_state_id AUTO_INCREMENT PRIMARY KEY, Rank INT, State VARCHAR, Revenue (millions) VARCHAR, Population INT, Revenue per capita VARCHAR, Spending (millions) VARCHAR, Spending per capita VARCHAR, Net contribution per capita VARCHAR, Presidential majority 2000/2004 VARCHAR, Presidential majority 2008 VARCHAR, Presidential majority 2012 VARCHAR, Obamacare: Fed/ State/ Partnership VARCHAR) CREATE TABLE house_of_habsburg_1482–1678 (house_of_habsburg_1482–1678_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Date of birth VARCHAR, Date of death VARCHAR, Reign VARCHAR, Relationship with predecessor VARCHAR)  
SELECT COUNT Year FROM wins_5 WHERE Championship = peter jackson classic